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Analog Devices Inc. LTC2373CUH-16#PBF
- Part No.:
- LTC2373CUH-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2373CUH-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
LTC2373CUH-16#PBF from Analog Devices is a 16-bit, 1 Msps, 8-channel successive approximation register (SAR) analog-to-digital converter with ±1 LSB INL (max), 96 dB SNR (fully differential), and integrated 2.048 V temperature-compensated reference. It operates from a single 5 V supply, supports fully differential (±4.096 V), pseudo-differential unipolar (0–4.096 V), and pseudo-differential bipolar (±2.048 V) input ranges, and is used in high-speed industrial data acquisition systems requiring precision and low crosstalk.
For engineers reviewing the LTC2373CUH-16#PBF datasheet, LTC2373CUH-16#PBF pinout, LTC2373CUH-16#PBF application, or LTC2373CUH-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, programmable sequencer depth of 16, SPI-compatible serial interface supporting 1.8–5 V I/O, internal reference buffer wake-up time (200 ms), and operation up to 70°C ambient.
Technical Context
The LTC2373CUH-16#PBF implements a true SAR architecture with no pipeline delay or cycle latency, enabling deterministic conversion timing. Its highly configurable 8-channel multiplexer delivers ≤ –107 dB channel-to-channel crosstalk and supports per-channel input range selection via configuration registers.
Conversion is initiated by a CNV pulse; an internal oscillator sets tCONV = 460–527 ns, while tCYC = 1 µs enables full 1 Msps throughput. The device features automatic nap mode between conversions and a dedicated sleep mode reducing current to 300 µA, scaling power dissipation with sampling rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes - ensures full dynamic range utilization without code gaps in critical measurement systems. |
| Sampling Rate | 1 Msps maximum - supports real-time capture of signals up to ~22 MHz (–3 dB input bandwidth) in high-speed DAQ applications. |
| INL | ±1 LSB (max) over full temperature range - enables accurate absolute voltage measurement without system-level calibration. |
| SNR | 96 dB (fully differential, fIN = 1 kHz) - delivers 15.9 effective bits for high-fidelity signal reconstruction. |
| Reference | Onboard 2.048 V ±0.5% (20 ppm/°C max) temp-compensated reference - eliminates external reference design complexity and drift sensitivity. |
| Power Dissipation | 40 mW at 1 Msps (nap mode); 300 µW in sleep mode - enables thermally constrained embedded and portable instrumentation designs. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade industrial control and test equipment environments. |
Pinout & Package
Package: 32-lead 5 mm × 5 mm plastic QFN (UH package) with exposed pad (Pin 33 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight single-ended or differential-capable inputs; configured via sequencer for flexible multi-sensor monitoring. |
| COM | Common-mode reference | Provides return path for pseudo-differential modes; sets common-mode voltage for fully differential operation. |
| ADCIN+, ADCIN− | Dedicated differential input pair | High-precision input for standalone fully differential measurements; bypasses multiplexer for lowest noise path. |
| MUXOUT+, MUXOUT− | Multiplexer output pair | Drives ADCIN+/- after channel selection; enables external signal conditioning before final conversion stage. |
| REFIN | Reference input | Accepts external 2.048 V reference or disables internal buffer when driven to 0 V (REFBUF overdrive mode). |
| REFBUF | Reference buffer output | Provides 4.096 V buffered reference (±0.5%); requires 47 µF bulk capacitor for 200 ms wake-up stability. |
| CNV | Conversion start trigger | Edge-sensitive input; initiates sample-and-hold and conversion sequence with 20 ns minimum pulse width. |
| BUSY | Conversion status indicator | Active-high open-drain output signaling ongoing conversion; used for timing synchronization or interrupt generation. |
| SDO, SDI, SCK, RDL | SPI-compatible serial interface | Supports 1.8–5 V logic levels; RDL enables 3-wire shared-bus operation; SDO valid 7.5–9.5 ns after SCK↑ (CL = 20 pF). |
| RESET | Hardware reset | Asynchronous active-low input; resets internal logic and sequencer; requires ≥200 ns pulse width. |
| VDD, OVDD, GND | Power supplies | VDD = 4.75–5.25 V analog supply; OVDD = 1.71–5.25 V I/O supply; multiple GND pins minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable 16-deep sequencer | Enables autonomous scanning across all 8 channels with per-channel gain/range configuration - reduces host processor overhead in PLC and sensor hub applications. |
| Selectable digital gain compression | Allows dynamic range optimization for varying input amplitudes without hardware reconfiguration - improves SNR in mixed-signal industrial fieldbus nodes. |
| No pipeline delay / zero cycle latency | Delivers immediate, deterministic conversion results - essential for closed-loop control systems requiring sub-microsecond feedback timing. |
| Low crosstalk multiplexer (–107 dB) | Prevents signal bleed between adjacent channels during high-frequency switching - critical for simultaneous multi-sensor acquisition in ATE and spectral analysis. |
| Single-shot capable reference buffer | Supports burst-mode operation with 200 ms wake-up time - enables ultra-low-power duty-cycled sensing in battery-powered instrumentation. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-density analog input modules acquiring temperature, pressure, and flow sensor outputs in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 16-bit ADC handling 8 independent 4–20 mA loop receivers with simultaneous sampling and on-chip reference stability. Use Value: ±1 LSB INL and 96 dB SNR ensure <±0.0015% full-scale accuracy across 0–70°C, eliminating field recalibration in harsh plant-floor environments. | Use Scenario: Distributed I/O subsystems monitoring reactor vessel parameters (pH, dissolved oxygen, conductivity) in chemical processing plants. IC Role / Device Role / Timing Role: Precision front-end digitizer with programmable sequencer managing multi-point sensor arrays and anti-alias filtering coordination. Use Value: Fully differential input support (±4.096 V) rejects common-mode noise from long cable runs, while 1 Msps throughput captures transient process events without aliasing. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: Benchtop oscilloscopes and spectrum analyzers requiring >100 kS/s per channel with low harmonic distortion. IC Role / Device Role / Timing Role: Core SAR ADC providing 16-bit resolution and –114 dB THD for clean FFT-based signal analysis up to Nyquist frequency. Use Value: 22 MHz –3 dB input bandwidth and aperture jitter of 4 ps RMS enable accurate time-domain waveform capture with <0.05% amplitude error at 100 kHz. | Use Scenario: Handheld multimeters and portable power quality analyzers needing battery-efficient, high-accuracy DC/AC voltage measurement. IC Role / Device Role / Timing Role: Low-power ADC with sleep mode (300 µW) and integrated reference - minimizes BOM count and thermal drift in compact enclosures. Use Value: Onboard 2.048 V reference (20 ppm/°C max) and 40 mW active power allow >10-hour battery life while maintaining ±0.01% basic accuracy over operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-16 | 8-channel, 16-bit, 1 Msps, but uses parallel interface and requires external reference; ±0.5 LSB INL; 100 dB PSRR. | Designed for FPGA/microcontroller systems with wide data buses; lacks integrated reference and sequencer flexibility. | Choose AD7606C-16 when legacy parallel interface compatibility or higher PSRR is prioritized over board space and reference integration. |
| ADS8688IPWR | 8-channel, 16-bit, 500 ksps, SPI interface, integrated reference; ±1.5 LSB INL; 92 dB SNR (typ); supports ±10.24 V input range. | Optimized for wide-input-range industrial sensors; lower speed and SNR than LTC2373CUH-16#PBF; no programmable sequencer. | Choose ADS8688IPWR when measuring high-voltage transducers (e.g., strain gauges with gain stages) and 500 ksps suffices. |
Compared with AD7606C-16 and ADS8688IPWR, the LTC2373CUH-16#PBF uniquely combines integrated reference, programmable sequencer, and 96 dB SNR in a compact QFN - making it optimal for space-constrained, high-fidelity, autonomous multi-channel acquisition where SPI interface and minimal external components are critical.
Availability
LTC2373CUH-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LTC2373CUH-16#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2373 family was designed specifically for high-accuracy, multi-channel industrial data acquisition - emphasizing low noise, low crosstalk, integrated reference stability, and deterministic timing in thermally demanding environments.
FAQ
What is the maximum sampling rate of the LTC2373CUH-16#PBF?
The LTC2373CUH-16#PBF achieves a maximum sampling rate of 1 Msps with guaranteed timing specifications across its 0°C to 70°C operating temperature range. This rate is supported by an internal oscillator that fixes conversion time at 460–527 ns and enforces a minimum 1 µs inter-conversion interval (tCYC), ensuring deterministic real-time behavior without external clock management overhead for the LTC2373CUH-16#PBF.
Does the LTC2373CUH-16#PBF require an external reference?
No, the LTC2373CUH-16#PBF integrates a precision 2.048 V temperature-compensated reference with 20 ppm/°C max drift and a dedicated reference buffer (REFBUF) that outputs 4.096 V. An external reference may be applied to REFIN only if higher accuracy or custom voltage is needed; otherwise, the internal reference eliminates BOM cost and layout complexity for the LTC2373CUH-16#PBF.
How does the programmable sequencer in the LTC2373CUH-16#PBF operate?
The LTC2373CUH-16#PBF features a 16-deep hardware sequencer that autonomously cycles through up to eight analog input channels (CH0–CH7), with per-channel configuration for input range (fully diff/pseudo-diff), gain, and digital compression. Sequencing is controlled via SPI writes to configuration registers, enabling unattended multi-channel acquisition without host intervention - a core capability distinguishing the LTC2373CUH-16#PBF from fixed-sequence ADCs.
What is the purpose of the MUXOUT+ and MUXOUT− pins on the LTC2373CUH-16#PBF?
MUXOUT+ and MUXOUT− provide buffered access to the output of the internal 8-channel multiplexer, placed ahead of the ADC core. These pins allow external signal conditioning (e.g., filtering, gain adjustment, or isolation) between multiplexing and conversion - preserving the LTC2373CUH-16#PBF's low-noise performance while enabling flexible analog front-end design not possible with direct CHx-to-ADCIN routing.
Can the LTC2373CUH-16#PBF operate with 1.8 V logic levels?
Yes, the LTC2373CUH-16#PBF supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels on its SPI interface (SDO, SDI, SCK, RDL) via the OVDD supply pin. When OVDD = 1.8 V, VIH = 1.44 V (min) and VOL = 0.2 V (max) are guaranteed, enabling seamless interfacing with low-voltage microcontrollers and FPGAs without level-shifting circuitry - a key interoperability feature of the LTC2373CUH-16#PBF.
LTC2373CUH-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 8
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2373CUH-16#PBF FAQ
1.How can I place an order for LTC2373CUH-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2373CUH-16#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2373CUH-16#PBF reliable?
The price and inventory of LTC2373CUH-16#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2373CUH-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2373CUH-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2373CUH-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2373CUH-16#PBF?
LTC2373CUH-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2373CUH-16#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2373CUH-16#PBF?
For technical support, including LTC2373CUH-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2373CUH-16#PBF requirements.
6.How does Aetrix verify that LTC2373CUH-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2373CUH-16#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2373CUH-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2373CUH-16#PBF?
All LTC2373CUH-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2373CUH-16#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2373CUH-16#PBF part is unused and in its original packaging.
Return procedure for LTC2373CUH-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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